Brush and method of making same



J. B. KIRBY.

BRUSH AND METHOD OF MAKING SAME.

' APPLICATION man APR-4, 191a.

Patent 1,333,663. ed Mar. 1 ,1920.

. UNITED STATES PATENT OFFICE.

4 JAMES KIBBY, OF CLEVELAND, OHIO, ASSIGNOR '10 ELECTRIC VACUUM CLEANER COMPANY, INC., A CORPORATION OF NEW YORK.

BRUSH AND insurer) or MAKING sun. I

. Application filed Apri1.4, 1916. Serial No. 88,759."

Methods of Making Same, of which the following is a full, clear, and exact descrip- 'tion, reference being-had to the accompanying drawings. v

his invention relates to brushes and es pecially to the elongated, cylindrical -or helical form of brush much used in various machinery such a suction-cleaners, carpet sweepers, curr ing machines, and the like.

The objects 0 the invention are the provision of a brush in which the bristles are secured against any possibility of being pulled out; which shall keep itself clean;

and which shall be peculiarly cheap in construction.

Theinvention in both its aspects, is defined in the claims hereto annexed and illustrated inthe drawings accompanying and forming part of this application wherein: Figures 1, 2, 3, 4 and 5 illustrate-successive steps in the manufacture of my improved brush; Fig. 6 is a perspective view of the device as it appears after the fifth operation; Fig. 7 is a perspective view of the brush after the sixth operation of twisting has been completed; and Fig. 8 isa perspective view of the twisted brush rod, the bristles beingomitted.

Describing the partsby reference characters 1 and 2 represent the die members for holding and manipulating the parts of my improved brush. In the present embodiment I have shown them as connected by a screw 3, thus forming a sort of vise, though these die members can, if desired be supported and manipulated by some other. me-

chanical means. One of these members is 1 provided at its face adjacent the other memdies 1-, 2, are at least as long as this blank.

The blank 5 having been secured'in the recess as shown, a suitable supply of bristles 6 of the desired length is applied to the top thereof so as to-project transversely thereof with their middles over the upwardly opening channel. suitable method, of distr buting jlan'd evening bristles may be employed, it being, immaterial to the present invention whether this be 'done by hand'or by some mechanical means; A rod or wire 7'Lis then laid upon these bristles in register-with the open channel and forced down into' that channel by operating the plunger 8, whereupon the parts assume the conditionshown in Fi 2. The length of the rod or wire 7 is at least as great as that of the blank 5 (see Fig. 6), and the constriction of the channel is such as to hold the bristles and rod therein afterthe plunger is removed.

The blank is then reversed to the position shown in Fig. 3, a new supply of bristles 6 applied, a second rod or wire 7* provided, and the plunger 8 actuated a second time, thus producing the condition shown in Fig. 4. The plunger is then removed and lateral pressure applied to the sides of the blank so as to close the channels. and pinch the bristles tightly together and about the rods or wires. I have illustrated these manipulations as all performed by the same dies or jaws though it is obvious that different jaws of the same or difi'erent shapes could be employed. The protruding ends of the bristles are then sheared 0r trimmed whereuponthe device appears as shown in Fig. 6.

The whole brush is then twisted, preferably by holding one end and rotating the other, since the uniform stiffness of the brush will result ina uniform twist. The brush is then complete except for the application of end caps, fittings, wheels, bearings or the like (not shown) which may be of Specification of Letters Patent; Patented Mar. 16, 1920.

any construction or secured in any of the in the claims hereto annexed or may be ren figq dered necessary by the prior state of th' art.

Having thus described my invention, what I claim is z 1. Ina brush, a'one piece sheet metal base member folded to produce a pair of longitudinal channels which open in different directions said channels having a common wall, arod or wire in each channel, and bristles projecting from each channel, the mid portions of said bristles being bent around said rods or wires.

2. In a brush, a bendable metal member having a longitudinal channel and a rod or wire in said channel, bristles bent around said rod or wire and having their ends projecting from said channel, and said channeled member being twisted from end to end so that said bristles define helical convolutions.

3. In a brush, a base member having a pair of longitudinal channels which open in diiferent directions, a rod or wire in each channel, and bristles projecting from each channel, the mid portions of said bristles being bent around said rods or wires, said base member being twisted from end to end so that said bristles define helical convolutions.

4. In a brush, a one piece sheet metal base member'folded to produce a pair of longitudinal channels having a common wall, and bristles held in each channel and projecting in opposite directions.

5. In a brush, a one piece sheet metal member folded to produce a pair of longitudinal channels having a common wall, and bristles held in each channel, said memher being twisted longitudinally about an axis within itself.

In testimony whereof, I hereunto afiix my signature. I

JAMES B. KIRBY. 

